Blast Valves
VNC-BV
VNC-BV -series Blast Dampers are designed for protection of ventilation systems against the effects of vapor and dust cloud explosions.
The VNC-BV -series Blast Dampers are applied in shielding of industrial facilities, such as Oil & Gas platforms and refineries or related buildings against destructive blast forces.
The VNC-BV -series offers substantially higher air flow capacity and increased level of safety, as well as flexibility in design of duct systems.
Structure of the VNC-BV -series damper is corrosion free, hot dip galvanized steel or EN 1.4404 (AISI316L) in the VNC-BV-SS version.
The VNC-BV -series damper has spring loaded closing blades built in a fully welded damper body to close the air passage in case of explosion or sudden increase of overpressure in the HVAC system.
The threshold trigger pressure of the damper can be adjusted according customer specification.
Once closed the blades will remain in closed position until they are manually reset after the incident.
The VNC-BV-series dampers fulfills ATEX (Ex II 2 G D) for equipment in hazardous environment.
• Fully welded damper body made of 5 mm steel
• VNC-BV-blast damper is manufactured of galvanized or stainless steel, EN 1.4404 (AISI316L)
• Closing blades and shafts provided with stainless steel bearings
• Adjustable trigger mechanism
• Fragment grill
• Flow guides
VNC-BV-WS
The blast valve VNC-BV-WS is for mounting on blast resistant wall surface.
It is specifically designed for installation on steel walls. It can also be installed in existing buildings where casting of the valve frame in concrete is not possible.
The valve is also applicable to industrial applications with risk of chemical and dust explosions.
The VNC-BV-WS blast valve is available in various different sizes.
Maximum height is 10 rows and width 7 columns. Contact Marine for the availability of frames with custom dimensions.
The number of blocks in valve depends on the air flow requirement at desired pressure drop.
When the valve dimensions do not match the opening to be covered, custom made adaptors are available.
The VNC-BV-WS blast valve block comprises three spring balanced closing elements moving in a slot and closing the air passage against the valve seats in response to both positive and negative (suction) phase of the blast.
The valve blocks are mounted in structual steel frames.
The valve is completely corrosion resistant.
The valve closing elements are made of special non-corroding aluminum alloy, all springs are made of stainless steel EN 1.4404 (AISI316L), and frame made of structural steel are hot dip galvanized.
VNC-BV-WS-O
The blast valve VNC-BV-WS-O is an application of the VNC-BV-WS blast valve for mounting on blast resistant wall surface.
It is specifically designed for installation on steel walls. It can also be installed in existing buildings where casting of the valve frame in concrete is not possible.
The valve is also applicable to industrial applications with risk of chemical and dust explosions.
The VNC-BV-WS-O blast valve is available in various different sizes.
Maximum height is 10 rows and width 7 columns. Contact Marine for the availability of frames with custom dimensions.
The number of blocks in valve depends on the air flow requirement at desired pressure drop.
When the valve dimensions do not match the opening to be covered, custom made adaptors are available.
The VNC-BV-WS-O blast valve block comprises three spring balanced closing elements moving in a slot and closing the air passage against the valve seats in response to both positive and negative (suction) phase of the blast.
The valve blocks are mounted in structual steel frames.
All the components of the valve are made of stainless steel EN 1.4404 (AISI316L).
The version is especially designed for offshore and other marine applications.
CODING
BV:Blast valve
WS:Wall surface
O:Optional